In hot climates, the dominant hot period conditions are important in terms of cooling load. Recently, climatic changes due to environmental pollution problems, such as the greenhouse effect and global warming, have given primary significance to energy consumption issues and cooling. This reserch aimsto compare the cooling load of a building in hot climate by using two different methods. The city of Antalya for the hot humid and the city of Diyarbakır for hot dry climatic types are chosen as sample cases. The calculation of cooling load is based on the Cooling Load Temperature Difference (CLTD) method and Admittance Method which is operated on a sample building for the day of design, 21 July. The cooling load calculations are evaluated by compare the results of the two different climate types and calculation methods.